
Can Alprazolam, Allegra D, Diphenhydramine And Phenylephrine Test Positive For Methamphetamine In A Lab Test?

the decongestants
Detailed Answer:
HI, thanks for using healthcare magic
The decongestant in allegra d (pseudoephedrine ) and the other decongestant mentioned phenylephrine can both cause false positive reactions for amphetamines or methamphetamines on an initial screening tests.
There are other drugs that can cause false positive for meth but none of the other medications mentioned in your list are included.
The more accurate test , the GC-MS , which stands for gas chromatography , mass spectrometry, would be able clear this up.
This test can be done where a result is a suspected false positive, it would be able to accurately determine that the result is not truly positive.
I hope this helps, feel free to ask any other questions


the GC- MS would be able to differentiate
Detailed Answer:
HI
Unfortunately, not able to review other doctor's answers but I can refer you to a site that lists the drugs that can cause false positive reactions-dig.pharm.uic.edu/faq/2011/feb/faq1.aspx
It lists both the decongestants as possible causes of false reactions in some persons.
The GC-MS test is accurate and would be able to differentiate between either of these drugs and any other substance
please feel free to ask anything else


skin absorption can occur
Detailed Answer:
HI
It is possible for methamphetamine to be absorbed via the skin so if the cans or its contents were contaminated with it and you were in contact with these areas then absorption is possible.
If anything else unclear, you can let me know

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